SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient

doi:10.3847/1538-4357/abdeb9

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	SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient
	Zeng, Xiangyun1,2 ; Wang, Xiaofeng 3,4,5; Esamdin, Ali1 ; Pellegrino, Craig 6,7; Zheng, WeiKang 8; Zhang, Jujia 9,10,11; Mo, Jun 3,4; Li, Wenxiong 3,4,12; Howell, D. Andrew 6,7; Filippenko, Alexei V.8,13; Lin, Han 3,4; Brink, Thomas G.8; Baron, Edward A.14; Burke, Jamison 6,7; DerKacy, James M.14; McCully, Curtis 6,7; Hiramatsu, Daichi 6,7; Hosseinzadeh, Griffin 6,15,16; Jeffers, Benjamin T.8; Ross, Timothy W.8; Stahl, Benjamin E.8,17; Stegman, Samantha 8,18; Valenti, Stefano 19; Wang, Lifan 20; Xiang, Danfeng 3,4; Zhang, Jicheng 3,4; Zhang, Tianmeng 21
	2021-03-01
Source Publication	ASTROPHYSICAL JOURNAL
ISSN	0004-637X
Volume	909 Issue:2 Pages:176
Contribution Rank	1
Abstract	We present extensive, well-sampled optical and ultraviolet photometry and optical spectra of the Type Ia supernova (SN Ia) 2017hpa. The light curves indicate that SN 2017hpa is a normal SN Ia with an absolute peak magnitude of M-max(B) approximate to -19.12 +/- 0.11 mag and a postpeak decline rate Delta m(15)(B) = 1.02 +/- 0.07 mag. According to the quasi-bolometric light curve, we derive a peak luminosity of 1.25 x 10(43) erg s(-1) and a Ni-56 mass of 0.63 +/- 0.02M(circle dot). The spectral evolution of SN 2017hpa is similar to that of normal Ia supernovae (SNe Ia), while it exhibits an unusually rapid velocity evolution resembling that of SN 1991bg-like SNe Ia or the high-velocity subclass of SNe Ia, with a postpeak velocity gradient of similar to 130 +/- 7 km s(-1) day(-1). Moreover, its early spectra (t < - 7.9 days) show a prominent C II lambda 6580 absorption feature, which disappeared in near-maximum-light spectra but reemerged at phases from t similar to + 8.7 days to t similar to + 11.7 days after maximum light. This implies that some unburned carbon may mix deep into the inner layer and is supported by the low C II lambda 6580-to-Si II lambda 6355 velocity ratio (similar to 0.81) observed in SN 2017hpa. The O I lambda 7774 line shows a velocity distribution like that of carbon. The prominent carbon feature, the low velocity seen in carbon and oxygen, and the large velocity gradient make SN 2017hpa stand out from other normal SNe Ia and are more consistent with predictions from a violent merger of two white dwarfs. Detailed modeling is still needed to reveal the nature of SN 2017hpa.
Keyword	Supernovae Type Ia supernovae
DOI	10.3847/1538-4357/abdeb9
URL	查看原文
Indexed By	SCI
Language	英语
WOS Keyword	DELAYED-DETONATION MODELS ; HUBBLE-SPACE-TELESCOPE ; CIRCUMSTELLAR MATERIAL ; OPTICAL-SPECTRA ; LIGHT CURVES ; FACTORY OBSERVATIONS ; DATA RELEASE ; PROGRAM ; ULTRAVIOLET ; EXPLOSION
Funding Project	National Natural Science Foundation of China (NSFC)[11873081] ; National Natural Science Foundation of China (NSFC)[U2031209] ; National Natural Science Foundation of China (NSFC)[12033002] ; National Natural Science Foundation of China (NSFC)[11633002] ; National Natural Science Foundation of China (NSFC)[11761141001] ; National Program on Key Research and Development Project[2016YFA0400803] ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Scholar Program of Beijing Academy of Science and Technology[DZ:BS202002] ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; National Natural Science Foundation of China[11773067] ; National Natural Science Foundation of China[11403096] ; Youth Innovation Promotion Association of the CAS[2018081] ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; TABASGO Foundation ; Christopher R. Redlich Fund ; Miller Institute for Basic Research in Science (U.C. Berkeley) ; NSF[AST-1911225] ; NASA's Astrophysics Data Analysis Program[NNX13AF35G]
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:000629537600001
Publisher	IOP PUBLISHING LTD
Funding Organization	National Natural Science Foundation of China (NSFC) ; National Program on Key Research and Development Project ; High Level Talent-Heaven Lake Program of Xinjiang Uygur Autonomous Region of China ; Scholar Program of Beijing Academy of Science and Technology ; Chinese Academy of Sciences ; People's Government of Yunnan Province ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the CAS ; Ten Thousand Talents Program of Yunnan for Top-notch Young Talents ; TABASGO Foundation ; Christopher R. Redlich Fund ; Miller Institute for Basic Research in Science (U.C. Berkeley) ; NSF ; NASA's Astrophysics Data Analysis Program
Citation statistics	Cited Times:6[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/3968
Collection	光学天文与技术应用研究室
Corresponding Author	Wang, Xiaofeng; Esamdin, Ali
Affiliation	1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China 3.Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China 4.Tsinghua Univ, Tsinghua Ctr Astrophys THCA, Beijing 100084, Peoples R China 5.Beijing Acad Sci Technol, Beijing Planetarium, Beijing 100044, Peoples R China 6.Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA 7.Las Cumbres Observ, 6740 Cortona Dr,Suite 102, Goleta, CA 93117 USA 8.Univ Calif Berkeley, Dept Astron, 601 Campbell Hall, Berkeley, CA 94720 USA 9.Chinese Acad Sci, Yunnan Observ YNAO, Kunming 650216, Yunnan, Peoples R China 10.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650216, Yunnan, Peoples R China 11.Chinese Acad Sci, Ctr Astron Megasci, 20A Datun Rd, Beijing 100012, Peoples R China 12.Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel 13.Univ Calif Berkeley, Miller Inst Basic Res Sci, Berkeley, CA 94720 USA 14.Univ Oklahoma, Homer L Dodge Dept Phys & Astron, Norman, OK 73019 USA 15.Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA 16.Las Cumbres Observ, 6740 Cortona Dr,Suite 102, Goleta, CA 93115 USA 17.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA 18.Univ Wisconsin, Dept Chem, 1101 Univ Ave, Madison, WI 53706 USA 19.Univ Calif Davis, Dept Phys, Davis, CA 95616 USA 20.Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, Dept Phys & Astron, 4242 TAMU, College Stn, TX 77843 USA 21.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
First Author Affilication	Xinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author Affilication	Xinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation GB/T 7714	Zeng, Xiangyun,Wang, Xiaofeng,Esamdin, Ali,et al. SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient[J]. ASTROPHYSICAL JOURNAL,2021,909(2):176.
APA	Zeng, Xiangyun.,Wang, Xiaofeng.,Esamdin, Ali.,Pellegrino, Craig.,Zheng, WeiKang.,...&Zhang, Tianmeng.(2021).SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient.ASTROPHYSICAL JOURNAL,909(2),176.
MLA	Zeng, Xiangyun,et al."SN 2017hpa: A Nearby Carbon-rich Type Ia Supernova with a Large Velocity Gradient".ASTROPHYSICAL JOURNAL 909.2(2021):176.

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